/
CollectLocalResourceUsage.java
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/
CollectLocalResourceUsage.java
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// Copyright 2018 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.lib.profiler;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.base.Preconditions;
import com.google.common.base.Stopwatch;
import com.google.devtools.build.lib.bugreport.BugReporter;
import com.google.devtools.build.lib.unix.ProcMeminfoParser;
import com.google.devtools.build.lib.util.OS;
import com.google.devtools.build.lib.worker.WorkerMetric;
import com.google.devtools.build.lib.worker.WorkerMetricsCollector;
import com.google.errorprone.annotations.concurrent.GuardedBy;
import com.sun.management.OperatingSystemMXBean;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.time.Duration;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
/** Thread to collect local resource usage data and log into JSON profile. */
public class CollectLocalResourceUsage extends Thread {
// TODO(twerth): Make these configurable.
private static final Duration BUCKET_DURATION = Duration.ofSeconds(1);
private static final Duration LOCAL_RESOURCES_COLLECT_SLEEP_INTERVAL = Duration.ofMillis(200);
private final BugReporter bugReporter;
private final boolean collectWorkerDataInProfiler;
private final boolean collectLoadAverage;
private volatile boolean stopLocalUsageCollection;
private volatile boolean profilingStarted;
@GuardedBy("this")
private TimeSeries localCpuUsage;
@GuardedBy("this")
private TimeSeries systemCpuUsage;
@GuardedBy("this")
private TimeSeries localMemoryUsage;
@GuardedBy("this")
private TimeSeries systemMemoryUsage;
@GuardedBy("this")
private TimeSeries workersMemoryUsage;
@GuardedBy("this")
private TimeSeries systemLoadAverage;
private Stopwatch stopwatch;
private final WorkerMetricsCollector workerMetricsCollector;
CollectLocalResourceUsage(
BugReporter bugReporter,
WorkerMetricsCollector workerMetricsCollector,
boolean collectWorkerDataInProfiler,
boolean collectLoadAverage) {
this.bugReporter = checkNotNull(bugReporter);
this.collectWorkerDataInProfiler = collectWorkerDataInProfiler;
this.workerMetricsCollector = workerMetricsCollector;
this.collectLoadAverage = collectLoadAverage;
}
@Override
public void run() {
int numProcessors = Runtime.getRuntime().availableProcessors();
stopwatch = Stopwatch.createStarted();
synchronized (this) {
localCpuUsage =
new TimeSeries(
/* startTimeMillis= */ stopwatch.elapsed().toMillis(), BUCKET_DURATION.toMillis());
localMemoryUsage =
new TimeSeries(
/* startTimeMillis= */ stopwatch.elapsed().toMillis(), BUCKET_DURATION.toMillis());
systemCpuUsage =
new TimeSeries(
/* startTimeMillis= */ stopwatch.elapsed().toMillis(), BUCKET_DURATION.toMillis());
systemMemoryUsage =
new TimeSeries(
/* startTimeMillis= */ stopwatch.elapsed().toMillis(), BUCKET_DURATION.toMillis());
if (collectWorkerDataInProfiler) {
workersMemoryUsage =
new TimeSeries(
/* startTimeMillis= */ stopwatch.elapsed().toMillis(), BUCKET_DURATION.toMillis());
}
if (collectLoadAverage) {
systemLoadAverage =
new TimeSeries(
/* startTimeMillis= */ stopwatch.elapsed().toMillis(), BUCKET_DURATION.toMillis());
}
}
OperatingSystemMXBean osBean =
(OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
Duration previousElapsed = stopwatch.elapsed();
long previousCpuTimeNanos = osBean.getProcessCpuTime();
profilingStarted = true;
while (!stopLocalUsageCollection) {
try {
Thread.sleep(LOCAL_RESOURCES_COLLECT_SLEEP_INTERVAL.toMillis());
} catch (InterruptedException e) {
return;
}
Duration nextElapsed = stopwatch.elapsed();
long nextCpuTimeNanos = osBean.getProcessCpuTime();
double systemCpuLoad = osBean.getSystemCpuLoad();
double systemUsage = systemCpuLoad * numProcessors;
long systemMemoryUsageMb = -1;
if (OS.getCurrent() == OS.LINUX) {
// On Linux we get a better estimate by using /proc/meminfo. See
// https://www.linuxatemyram.com/ for more info on buffer caches.
try {
ProcMeminfoParser procMeminfoParser = new ProcMeminfoParser("/proc/meminfo");
systemMemoryUsageMb =
(procMeminfoParser.getTotalKb() - procMeminfoParser.getFreeRamKb()) / 1024;
} catch (IOException e) {
// Silently ignore and fallback.
}
}
if (systemMemoryUsageMb <= 0) {
// In case we aren't running on Linux or /proc/meminfo parsing went wrong, fall back to the
// OS bean.
systemMemoryUsageMb =
(osBean.getTotalPhysicalMemorySize() - osBean.getFreePhysicalMemorySize())
/ (1024 * 1024);
}
long memoryUsage;
try {
memoryUsage =
memoryBean.getHeapMemoryUsage().getUsed()
+ memoryBean.getNonHeapMemoryUsage().getUsed();
} catch (IllegalArgumentException e) {
// The JVM may report committed > max. See b/180619163.
bugReporter.sendBugReport(e);
memoryUsage = -1;
}
int workerMemoryUsageMb = 0;
if (collectWorkerDataInProfiler) {
workerMemoryUsageMb =
this.workerMetricsCollector.collectMetrics().stream()
.map(WorkerMetric::getWorkerStat)
.filter(Objects::nonNull)
.mapToInt(WorkerMetric.WorkerStat::getUsedMemoryInKB)
.sum()
/ 1024;
}
double loadAverage = 0;
if (collectLoadAverage) {
loadAverage = osBean.getSystemLoadAverage();
}
double deltaNanos = nextElapsed.minus(previousElapsed).toNanos();
double cpuLevel = (nextCpuTimeNanos - previousCpuTimeNanos) / deltaNanos;
synchronized (this) {
if (localCpuUsage != null) {
localCpuUsage.addRange(previousElapsed.toMillis(), nextElapsed.toMillis(), cpuLevel);
}
if (localMemoryUsage != null && memoryUsage != -1) {
long memoryUsageMb = memoryUsage / (1024 * 1024);
localMemoryUsage.addRange(
previousElapsed.toMillis(), nextElapsed.toMillis(), (double) memoryUsageMb);
}
if (systemCpuUsage != null) {
systemCpuUsage.addRange(previousElapsed.toMillis(), nextElapsed.toMillis(), systemUsage);
}
if (systemMemoryUsage != null) {
systemMemoryUsage.addRange(
previousElapsed.toMillis(), nextElapsed.toMillis(), (double) systemMemoryUsageMb);
}
if (collectWorkerDataInProfiler && (workersMemoryUsage != null)) {
workersMemoryUsage.addRange(
previousElapsed.toMillis(), nextElapsed.toMillis(), workerMemoryUsageMb);
}
if (collectLoadAverage && loadAverage > 0) {
systemLoadAverage.addRange(
previousElapsed.toMillis(), nextElapsed.toMillis(), loadAverage);
}
}
previousElapsed = nextElapsed;
previousCpuTimeNanos = nextCpuTimeNanos;
}
}
public void stopCollecting() {
Preconditions.checkArgument(!stopLocalUsageCollection);
stopLocalUsageCollection = true;
interrupt();
}
synchronized void logCollectedData() {
if (!profilingStarted) {
return;
}
Preconditions.checkArgument(stopLocalUsageCollection);
long endTimeNanos = System.nanoTime();
long elapsedNanos = stopwatch.elapsed(TimeUnit.NANOSECONDS);
long startTimeNanos = endTimeNanos - elapsedNanos;
int len = (int) (elapsedNanos / BUCKET_DURATION.toNanos()) + 1;
Profiler profiler = Profiler.instance();
logCollectedData(profiler, localCpuUsage, ProfilerTask.LOCAL_CPU_USAGE, startTimeNanos, len);
localCpuUsage = null;
logCollectedData(
profiler, localMemoryUsage, ProfilerTask.LOCAL_MEMORY_USAGE, startTimeNanos, len);
localMemoryUsage = null;
logCollectedData(profiler, systemCpuUsage, ProfilerTask.SYSTEM_CPU_USAGE, startTimeNanos, len);
systemCpuUsage = null;
logCollectedData(
profiler, systemMemoryUsage, ProfilerTask.SYSTEM_MEMORY_USAGE, startTimeNanos, len);
systemMemoryUsage = null;
if (collectWorkerDataInProfiler) {
logCollectedData(
profiler, workersMemoryUsage, ProfilerTask.WORKERS_MEMORY_USAGE, startTimeNanos, len);
}
workersMemoryUsage = null;
if (collectLoadAverage) {
logCollectedData(
profiler, systemLoadAverage, ProfilerTask.SYSTEM_LOAD_AVERAGE, startTimeNanos, len);
}
systemLoadAverage = null;
}
private static void logCollectedData(
Profiler profiler, TimeSeries timeSeries, ProfilerTask type, long startTimeNanos, int len) {
double[] localResourceValues = timeSeries.toDoubleArray(len);
for (int i = 0; i < len; i++) {
long eventTimeNanos = startTimeNanos + i * BUCKET_DURATION.toNanos();
profiler.logEventAtTime(eventTimeNanos, type, String.valueOf(localResourceValues[i]));
}
}
}